samba-mirror/source4/setup/pwsettings

#!/usr/bin/python
#
#	Sets password settings (Password complexity, history length,
#	minimum password length, the minimum and maximum password age) on a
#	Samba4 server
#
#	Copyright Jelmer Vernooij 2008
#	Copyright Matthias Dieter Wallnoefer 2009
#	Released under the GNU GPL version 3 or later
#
import os, sys

sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), "../bin/python"))

import samba.getopt as options
import optparse
import pwd
import ldb

from samba.auth import system_session
from samba.samdb import SamDB
from samba.dcerpc.samr import DOMAIN_PASSWORD_COMPLEX

parser = optparse.OptionParser("pwsettings (show | set <options>)")
sambaopts = options.SambaOptions(parser)
parser.add_option_group(sambaopts)
parser.add_option_group(options.VersionOptions(parser))
credopts = options.CredentialsOptions(parser)
parser.add_option_group(credopts)
parser.add_option("-H", help="LDB URL for database or target server", type=str)
parser.add_option("--complexity",
  help="The password complexity (on | off). Default is 'on'", type=str)
parser.add_option("--history-length",
  help="The password history length (<integer> | default)", type=str)
parser.add_option("--min-pwd-length",
  help="The minimum password length (<integer> | default)", type=str)
parser.add_option("--min-pwd-age",
  help="The minimum password age (<integer in days> | default)", type=str)
parser.add_option("--max-pwd-age",
  help="The maximum password age (<integer in days> | default)", type=str)

opts, args = parser.parse_args()

#
#  print a message if quiet is not set
#
def message(text):
	if not opts.quiet:
		print text

if len(args) == 0:
	parser.print_usage()
	sys.exit(1)

lp = sambaopts.get_loadparm()

creds = credopts.get_credentials(lp)

if opts.H is not None:
	url = opts.H
else:
	url = lp.get("sam database")

samdb = SamDB(url=url, session_info=system_session(),
              credentials=creds, lp=lp)

res = samdb.search("", scope=ldb.SCOPE_BASE,
	  expression="(defaultNamingContext=*)",
	  attrs=["defaultNamingContext"])
assert(len(res) == 1 and res[0]["defaultNamingContext"] is not None)
domain_dn = res[0]["defaultNamingContext"][0]

res = samdb.search(domain_dn, scope=ldb.SCOPE_BASE, attrs=["pwdProperties",
  "pwdHistoryLength", "minPwdLength", "minPwdAge", "maxPwdAge"])
assert(len(res) == 1)
try:
	pwd_props = int(res[0]["pwdProperties"][0])
	pwd_hist_len = int(res[0]["pwdHistoryLength"][0])
	min_pwd_len = int(res[0]["minPwdLength"][0])
	min_pwd_age = int(res[0]["minPwdAge"][0])
	max_pwd_age = int(res[0]["maxPwdAge"][0])
except:
	if args[0] == "show":
		print "ERROR: Password informations missing in your AD domain object!"
		print "So no settings can be displayed!"
		sys.exit(1)
	else:
		if pwd_props is None:
			pwd_props = 0
			print "WARNING: Assuming previous password properties 0 (used for password complexity setting)"

if args[0] == "show":
	print "Password informations for domain '" + domain_dn + "'"
	print ""
	if pwd_props & DOMAIN_PASSWORD_COMPLEX != 0:
		print "Password complexity: on"
	else:
		print "Password complexity: off"
	print "Password history length: " + str(pwd_hist_len)
	print "Minimum password length: " + str(min_pwd_len)
	print "Minimum password age: " + str(min_pwd_age)
	print "Maximum password age: " + str(max_pwd_age)

elif args[0] == "set":
	if opts.complexity is not None:
		if opts.complexity == "on":
			pwd_props = pwd_props | DOMAIN_PASSWORD_COMPLEX

			m = ldb.Message()
			m.dn = ldb.Dn(samdb, domain_dn)
			m["pwdProperties"] = ldb.MessageElement([],
			  ldb.CHANGETYPE_DELETE, "pwdProperties")
			samdb.modify(m)
			m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
			  ldb.CHANGETYPE_ADD, "pwdProperties")
			samdb.modify(m)
			print "Password complexity activated!"
		elif opts.complexity == "off":
			pwd_props = pwd_props & (~DOMAIN_PASSWORD_COMPLEX)

			m = ldb.Message()
			m.dn = ldb.Dn(samdb, domain_dn)
			m["pwdProperties"] = ldb.MessageElement([],
			  ldb.CHANGETYPE_DELETE, "pwdProperties")
			samdb.modify(m)
			m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
			  ldb.CHANGETYPE_ADD, "pwdProperties")
			samdb.modify(m)
			print "Password complexity deactivated!"
		else:
			print "ERROR: Wrong argument '" + opts.complexity + "'!"
			sys.exit(1)

	if opts.history_length is not None:
		if opts.history_length == "default":
			pwd_hist_len = 24
		else:
			pwd_hist_len = int(opts.history_length)

		m = ldb.Message()
		m.dn = ldb.Dn(samdb, domain_dn)
		m["pwdHistoryLength"] = ldb.MessageElement([],
		  ldb.CHANGETYPE_DELETE, "pwdHistoryLength")
		samdb.modify(m)
		m["pwdHistoryLength"] = ldb.MessageElement(str(pwd_hist_len),
		  ldb.CHANGETYPE_ADD, "pwdHistoryLength")
		samdb.modify(m)
		print "Password history length changed!"

	if opts.min_pwd_length is not None:
		if opts.min_pwd_length == "default":
			min_pwd_len = 7
		else:
			min_pwd_len = int(opts.min_pwd_length)

		m = ldb.Message()
		m.dn = ldb.Dn(samdb, domain_dn)
		m["minPwdLength"] = ldb.MessageElement([],
		  ldb.CHANGETYPE_DELETE, "minPwdLength")
		samdb.modify(m)
		m["minPwdLength"] = ldb.MessageElement(str(min_pwd_len),
		  ldb.CHANGETYPE_ADD, "minPwdLength")
		samdb.modify(m)
		print "Minimum password length changed!"

	if opts.min_pwd_age is not None:
		if opts.min_pwd_age == "default":
			min_pwd_age = 0
		else:
			min_pwd_age = int(opts.min_pwd_age)

		m = ldb.Message()
		m.dn = ldb.Dn(samdb, domain_dn)
		m["minPwdAge"] = ldb.MessageElement([],
		  ldb.CHANGETYPE_DELETE, "minPwdAge")
		samdb.modify(m)
		m["minPwdAge"] = ldb.MessageElement(str(min_pwd_age),
		  ldb.CHANGETYPE_ADD, "minPwdAge")
		samdb.modify(m)
		print "Minimum password age changed!"

	if opts.max_pwd_age is not None:
		if opts.max_pwd_age == "default":
			max_pwd_age = -37108517437440
		else:
			max_pwd_age = int(opts.max_pwd_age)

		m = ldb.Message()
		m.dn = ldb.Dn(samdb, domain_dn)
		m["maxPwdAge"] = ldb.MessageElement([],
		  ldb.CHANGETYPE_DELETE, "maxPwdAge")
		samdb.modify(m)
		m["maxPwdAge"] = ldb.MessageElement(str(max_pwd_age),
		  ldb.CHANGETYPE_ADD, "maxPwdAge")
		samdb.modify(m)
		print "Maximum password age changed!"

	print "All changes applied successfully!"

else:
	print "ERROR: Wrong argument '" + args[0] + "'!"
	sys.exit(1)